88929domain: NAppears in sequencesNumbers k such that phi(k) and cototient(k) are squares but k is not in A054755.at n=34A054756a(n) = (11^n + 7^n)/2.at n=5A152106Numbers n such that n^2 = a^2 + b^5 (with integers a, b > 0) and gcd(a, b, n) = 1.at n=37A293284Expansion of e.g.f.: 1/(2 - exp(x) - sinh(x)).at n=6A352326